I installed WIndows XP SP3 onto a PC over the weekend through Windows Updates. Everything went smoothly with no problems. That has not been the case for every one, but you come to expect that with service packs. I’ll be testing the redistributable and ISO installs soon to see how they work. Although the release is tagged as final, make sure you backup critical data before installing.
This PC also happens to be the first one I’ve ever had to replace the CMOS battery on. Let me be the first to tell you what kind of crazy errors a system gets when it thinks it is the year 22098. iTunes and Firefox both crash hard.